package io.github.dunwu.javacore.jvm.gc;

/**
 * VM参数：-verbose:gc -Xms20M -Xmx20M -Xmn10M -XX:+PrintGCDetails -XX:SurvivorRatio=8 -XX:MaxTenuringThreshold=1
 * -XX:+PrintTenuringDistribution
 *
 * @author Zhang Peng
 * @date 2018/4/13
 */
public class TenuringThresholdDemo {

	private static final int _1MB = 1024 * 1024;

	public static void main(String[] args) {
		byte[] allocation1, allocation2, allocation3;
		// 什么时候进入老年代决定于XX:MaxTenuringThreshold设置
		allocation1 = new byte[_1MB / 4];
		allocation2 = new byte[4 * _1MB];
		allocation3 = new byte[4 * _1MB];
		allocation3 = null;
		allocation3 = new byte[4 * _1MB];
	}

}
